libboost-system/1.81.0+1

The Boost.System library, part of Boost C++ Libraries, implements an extensible framework for error reporting in the form of an error_code class and supporting facilities.

It has been proposed for the C++11 standard, has been accepted, and is now available as part of the standard library in the <system_error> header. However, the Boost implementation has continued to evolve and gain enhancements and additional functionality, such as support for attaching source locations to error_code, and a result<T> class that can carry either a value or an error code.